Help please!! Cat can't walk 1 week after Rabies vaccine

First are the back legs and then all four legs can't stand straight.Still eat a little.

Went to ER and all test results are fine. Haven't seen a neurologist as recommend. Have a appointment with my vet on monday. I highly suspect it's the vaccine.

I remember reading from here someone's cat got really sick after Rabies shot, but can't find it now. Please post the link( I think it's in someone's blog) again if you have. Thank you very much. Any insight or info are very welcomed. Thanks.